A novel, one-pot procedure for the preparation of N-acryloyl- alpha -amino acids involves the steps of: i) reacting a ketone, an ammonium salt, and a cyanide salt in water, optionally in the presence of ammonium hydroxide and a co-solvent, to form an aminonitrile; ii) acryloylating the aminonitrile in aqueous media to afford an acrylamidonitrile; and iii) hydrolyzing with aqueous acid the acrylami...

A tampon for hygienic use comprising a generally cylindrical absorbent core having a liquid pervious cover layer on the outer surface thereof wherein the cover layer is a polymer net comprising two intersecting sets of parallel ribs and wherein each set of ribs are aligned obliquely with respect to both the main axis of the tampon and to each other. A strip of net may be bonded to one end of a str...

The microfluidic structure comprises first and second substantially planar form-stable base layers and an intermediate spacing layer of elastic material, said spacing layer being recessed to define a microcavity or channel system with at least one of said first and second base layers. The structure is produced by moulding the spacing layer, optionally applied to or integral with a first base layer...

A vehicle window includes a glass ply with a layer of thermoset polyurethane over the outer face of the glass which inhibits Restrahlen Band reflection at 8-12 microns from the glass. The polyurethane layer may include an inner layer portion of relatively hard polyurethane and an outer layer of relatively soft polyurethane.

PCT No. PCT/GB92/02239 Sec. 371 Date Jul. 19, 1993 Sec. 102(e) Date Jul. 19, 1993 PCT Filed Dec. 2, 1992 PCT Pub. No. WO93/11469 PCT Pub. Date Jun. 10, 1993.An optical analysis or processing system for use, for example, in the analysis of microscopic spots of material by their effect on a very fine polarized beam of light (e.g., FPIA). For multiple "spot" analysis the spot samples are disposed on ...

This apparatus permits the non-destructive examination of entire surfaces for defects and contamination, and can detect microscopically small dot-shaped and linear defects and extremely fine macroscopic non-homogeneous areas. For this purpose, an astigmatic lens system (5) is placed in the optical path between light source (2) and objective (9) which produces a cigar-shaped intermediate image (31)...

This apparatus permits the non-destructive examination of entire surfaces for defects and contamination, and can detect microscopically small dot-shaped and linear defects and extremely fine macroscopic non-homogeneous areas. For this purpose, an adjustable lens system (5) is placed in the optical path between light source (2) and objective (9) which produces various intermediate images (31). A fi...

Disclosed is a process for navigating an unmanned vehicle over a predeterminable course, respectively such a vehicle. A steering and control unit determines by a first sensor at least the stretch covered and detects by at least one second sensor objects in the vicinage the position of which is stored in the steering and control unit and which serve the purpose of checking the position of the vehic...

A joint comprises a body including a cylindrical front wall having an inner bore, a small diameter chamber extending from the bore and having a diameter larger than that of the cylindrical wall, a large diameter chamber extending rearwardly from the small diameter chamber, and a rear, engagement wall, seal rings disposed in the small diameter chamber through a spacer, and a discrete socket having ...

The invention concerns a method and an apparatus for the automatic control of a guided vehicle and proposes a new safety concept which, if breakdowns and/or emergencies arise, prevents the vehicle from being stopped in tunnels, on bridges or on pathless terrain. The invention lies in that between preselected stopping regions provided with means for evacuation of passengers and for intervention by ...

A cut resistant pneumatic tire is provided. The tire has a monofilament wire structure embedded in or under its tread or sidewall, and is used in off the road applications such as mining. The monofilament (22a,22b) wire has a diameter of 0.4 to 1.2mm and is made of brass plated steel. The wire may be woven or may have a spring link configuration. Two monofilament wires may be twisted together, and...

The invention relates to a front jaw (1) with a housing (2), with a release spring (5) and with a tie rod (8) which can be actuated against the force of this spring and on which a control plate (9) is arranged which is subjected to the action of shorter lever arms (11a) of two angle levers (11) mounted on vertical axles in the housing. The object of the invention is to compensate for the increased...

The present invention relates to an apparatus for producing a fiber web comprising a feeder 1 for supplying a fiber material, a plurality of fiber opening cylinders 21, 22, 23, . . . 2n (n is a natural number) mounted adjacent to one another for transferring and opening the fiber material fed from the feeder 1 and having metallic wires 2a mounted to the surface thereof, a conveyor 7 arranged for r...

A test taking arrangement for several separate testing points, especially for ground water and ground air tests, the arrangement has a guiding tube insertable into a ground opening and having a wall which is gas and liquid permeable at least in regions of testing points, transverse walls arranged in the guiding tube between the regions of the testing points and provided with closeable openings for...

A multiple function cauterizing instrument having a housing and an illuminating optical fiber extending from a lens, through the housing, to a high intensity light source for supplying incident light to the targeted tissue area to be cauterized. A viewing optical fiber extends from a wide angle camera lens, through the housing, to a video monitor for supplying to the monitor a visual image of the ...

An assembly of an article and a polyimide composition is prepared. The assembly resists dimensional change, delamination, or debonding when exposed to changes in temperature. An article is provided. A polyamic acid solution which yields a polyimide having a low coefficient of thermal expansion (CTE) was prepared. Equimolar quantities of an aromatic diamine and an aromatic dianhydride were reacted ...

A method for preparing a decomposable film which comprises the steps of dispersing poly- alpha -methylstyrene or a polyalkylene carbonate in water, or preferably dissolving poly- alpha -methylstyrene or the polyalkylene carbonate in a solvent, dispersing the resulting solution in water, vaporizing the solvent so that the content of the solvent may be in the range of from 20 to 100% by weight based...

The present invention provides for a polymer composition comprising a blend of from about 25 to about 90% by weight of a very low density ethylene polymer having a density on the range of from about 0.88 to 0.925 g/cm3, a melt index of from about 0.5 to about 7.5 dg/min, a molecular weight distribution not greater than about 3.5 and a compositional distribution breadth index greater than about 70%...

Disclosed herein is a polyvinyl chloride resin composition for powder molding which comprises granular polyvinyl chloride resin (as component A), particulate polyvinyl chloride resin (as component B), stabilizer, plasticizer, and saccharide (as component C). Disclosed also herein is a process for producing said resin composition by mixing granular polyvinyl chloride resin (as component A), particu...